How to remove integers from a string type array?

Question

I have an array of type string which has numbers and characters such as string[] TagsSeperatedArray={"tag1","tag2","1234",""} i want to remove 1234 and "" from the array. How can I do this. Can someone please help me. I am using asp.net c#.

foreach(var item in TagsSeperatedArray)
                {
                    if()
                    {

                    }

                }

Answer 1

One way to do this would be:

var arr = new[] { "tag1", "tag2", "1234", "" };
Console.WriteLine(string.Join(",", arr)); // tag1,tag2,1234,
var newArr = arr.Where(value => !string.IsNullOrWhiteSpace(value)
    && !int.TryParse(value, out _)).ToArray();
Console.WriteLine(string.Join(",", newArr)); // tag1,tag2

Note, however, that this allocates an extra array etc; it would be more efficient with a list, since you can directly remove:

var list = new List<string> { "tag1", "tag2", "1234", "" };
Console.WriteLine(string.Join(",", list)); // tag1,tag2,1234,
list.RemoveAll(value => string.IsNullOrWhiteSpace(value) || int.TryParse(value, out _));
Console.WriteLine(string.Join(",", list)); // tag1,tag2

Answer 2

You could use Linq for this, something like:

TagsSeparatedArray.Where(item => !int.TryParse(item, out int _))

This would exclude those that can be converted to int .

Answer 3

Based on the answer of @Marc Grawell

    private string[] RemoveNumerics(string[] TheArray)
    {
        List<string> list = new List<string>();
        list.AddRange(TheArray);
        list.RemoveAll(value => string.IsNullOrWhiteSpace(value) || int.TryParse(value, out _));
        return list.ToArray();
    }

And in case you do not want it as a lambda expression:

foreach(string value in list)
    if (string.IsNullOrWhiteSpace(value) || int.TryParse(value, out _))
        list.Remove(value);

Cheers